#include "err_msg.h"
#include <stdio.h>
#include <string.h>

int main()
{
	char buf[128] = "this is a test";
	printf("%d\n", strlen(buf));
	buf[4] = '\0';
	buf[strlen(buf)] = '/';
	buf[strlen(buf)] = '\0';
	printf("%d\n", strlen(buf));
	err_ret("ahhahah");
}
